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Note 9 - Investments (Details) - Related Party Information for Investments in Affiliates (Affiliated Companies [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Affiliated Companies [Member]
       
Note 9 - Investments (Details) - Related Party Information for Investments in Affiliates [Line Items]        
Corning sales to affiliated companies $ 3 $ 15 $ 6 $ 28
Corning purchases from affiliated companies 68 50 137 68
Corning transfers of assets, at cost, to affiliated companies 7 16 13 25
Dividends received from affiliated companies 21 3 182 521
Royalty income from affiliated companies 14 22 30 44
Corning services to affiliates   $ 6 $ 2 $ 16